j2k: flatten test cases and testData directory structure

Move j2k/test/tests -> j2k/tests, j2k/test/testData -> j2k/testData

j2k/testData/fileOrElement/comments/comments2.kt

@@ -0,0 +1,28 @@
+// ERROR: A 'return' expression required in a function with a block body ('{...}')
+// ERROR: A 'return' expression required in a function with a block body ('{...}')
+package foo
+
+class A {
+    fun /* nothing to return */ foo(/* no parameters at all */) {
+        // let declare a variable
+        // with 2 comments before
+        val /*int*/ a /* it's a */ = 2 /* it's 2 */ + 1 /* it's 1 */ // variable a declared
+    } // end of foo
+
+    fun /* we return int*/ foo(/*int*/ p: Int/* parameter p */): Int {
+        /* body is empty */
+    }
+
+    private /*it's private*/ val field = 0
+
+    public /*it's public*/ fun foo(s: String): Char {
+    }
+
+    protected /*it's protected*/ fun foo(c: Char) {
+    }
+
+    class object {
+
+        public /*it's public*//*and static*//*and final*/ val C: Int = 1
+    }
+}